The electrical properties of Na1/2Bi1/2Cu3Ti4O12 (NBCTO) ceramics between similar to 8 and 400 K are electrically inhomogeneous, consisting of semiconducting grains and insulating grain boundaries, similar to isostructural CaCu3Ti4O12 (CCTO); however, the intrinsic permittivity of NBCTO of similar to 250 at 10 K is much higher compared to similar to 110 for CCTO. Possible explanations for this high intrinsic permittivity are discussed. (c) 2006 American Institute of Physics.
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N China Univ Water Resources & Elect Power, Sch Math & Informat Sci, Zhengzhou 450011, Peoples R ChinaHuazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
Xu, Bin
Zhang, Jing
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N China Univ Water Resources & Elect Power, Sch Math & Informat Sci, Zhengzhou 450011, Peoples R ChinaHuazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
Zhang, Jing
Tian, Zhaoming
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Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
Tian, Zhaoming
Yuan, S. L.
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Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China